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- 변형지도 모델링을 통한 구리 분말 소결체의 고온 변형에 따른 미세조직 연구
- 장수호, 김영무, 박경채
- Microstructural Evolution during Hot Deformation of P/M Copper using Processing Map
- Soo-Ho Chang, Young-Moo Kim, Kyung-Chae Park
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Journal of Korean Powder Metallurgy Institute 2012;19(2):134-139
DOI: https://doi.org/10.4150/KPMI.2012.19.2.134
1경북대학교 금속공학과
2국방과학연구소 국방소재기술부
3경북대학교 금속공학과
1School of Material Science and Metallurgical Engineering, Kyungpook National University
2Defense Material and Evaluation Technology Directorate, Agency for Defense Development
3School of Material Science and Metallurgical Engineering, Kyungpook National University
2국방과학연구소 국방소재기술부
3경북대학교 금속공학과
1School of Material Science and Metallurgical Engineering, Kyungpook National University
2Defense Material and Evaluation Technology Directorate, Agency for Defense Development
3School of Material Science and Metallurgical Engineering, Kyungpook National University
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Abstract
P/M coppers are subjected to the isothermal compression tests at the strain rate ranging from 0.01 to 10.0 s-1 and the temperature from 200 to 800°C. The processing map reveals the dynamic recrystallization (DRX) domain in the following temperature and strain rate ranges: 600-800°C and 0.01-10.0 s-1, respectively. In the domain, the region at temperature of 600°C and strain rate of 10-2s-1 shows peak efficiency. From the kinetic analysis, the apparent activation energy in the DRX domain is 190.67 kJ/mol and it suggests that lattice self-diffusion is the rate controlling mechanism.
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